All those dimensions were rolled up into spaces beyond our detection. In other words, Western science said:
"We don't know, and we give up, so let's roll the unknown into tiny strings and weave them out of sight."
In other words, FAIL. Don't expect any more solutions from this Western-dominated system of FAIL. We'll have to wait for "Chindia" to arrive at the level of prosperity that allows significant high-energy physics, to take the next step in understanding. The Western physicists have gotten fat and lazy, and they've obviously GIVEN UP.